A 2007 Kelton Research survey revealed that people know more about what goes into a Big Mac than they do about the Bible; they can name members of the Brady Bunch better than they can name the Ten Commandments. Twelve percent of adults think that Noah’s wife was Joan of Ark, and about half don’t know that the book of Isaiah is in the Old Testament. The situation might have comic possibilities for Jay Leno and other comedians, but for preachers working to craft a biblically based sermon, the situation is confounding. If parishioners can’t follow references to significant people, places or things in the Bible, they may miss or misunderstand the whole message.